Assuming that there is no dots on any of the bottom shown, i would go with the 2nd top left, that would be the next pattern.
A and B must be disjoint. You have, by the inclusion/exclusion principle, that

where the last term is required to prevent double counting. When

and

are disjoint, you have

and

, leaving you with
Answer:
cool
Step-by-step explanation:
Answer: 9 weeks
Step-by-step explanation: Subtract 126(final amount) by 45(starting amount) and you will get 81(amount of money made of # of weeks). Divide 81 by 9(money made per week) and you will get 9. (# of weeks)